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Brief description of the drawings
FIG. 1 is a half sectional view of a conventional speaker, FIG. 2 is a half sectional view of the
speaker according to the first embodiment of the present invention, FIG. 3 is an enlarged
sectional view of an essential part of the second embodiment, and FIG. It is a principal part
expanded sectional view of an example. 1 ... magnetic gap, 3 ... voice coil, 4 ... diaphragm, 6 ...
edge, 7 ... frame, 9 ... edge guide.